The police suspects the three are in league. The police then arranges the three to stay alone. However, they eventually find out that they really do not know one another. The police discovers that HEI's wife was scratched by somebody. Simultaneously, the victim also got some skin fibre. The report proves that the skin fibre matches HEI’s wife's skin fibre. The police follow HEI’s wife. Unexpectedly, the police finds that HEI's wife is meeting FU and MING’s wives. The police immediately arrests them. The police also knows that a chemical factory has sold some poison to HEI’s wife. The three have no more excuse. They disclose the truth as well as their grievance. The victim not only extorted money from them, she even insulted the three defendants. The three defendants eventually could not controlled their temper and attacked the victim with a poisoned needle, a knife and a pistol.